Limit build workflow to macOS only

Author: lijy91

.github/workflows/build.yml

@@ -11,14 +11,8 @@ jobs:
     strategy:
       matrix:
         os:
-          - ubuntu-latest
-            windows-latest
-            macos-latest
+          - macos-latest
         include:
-          # - os: ubuntu-latest
-          #   platform: linux
-          # - os: windows-latest
-          #   platform: windows
           - os: macos-latest
             platform: macos